io.druid.query.aggregation.cardinality.types

Class LongCardinalityAggregatorColumnSelectorStrategy

java.lang.Object

io.druid.query.aggregation.cardinality.types.LongCardinalityAggregatorColumnSelectorStrategy

All Implemented Interfaces:

CardinalityAggregatorColumnSelectorStrategy<BaseLongColumnValueSelector>, ColumnSelectorStrategy

public class LongCardinalityAggregatorColumnSelectorStrategy
extends Object
implements CardinalityAggregatorColumnSelectorStrategy<BaseLongColumnValueSelector>

Constructor Summary

Constructors

Constructor and Description
LongCardinalityAggregatorColumnSelectorStrategy()

Method Summary

Modifier and Type	Method and Description
void	hashRow(BaseLongColumnValueSelector dimSelector, com.google.common.hash.Hasher hasher) Retrieve the current row from dimSelector and add the row values to the hasher.
void	hashValues(BaseLongColumnValueSelector dimSelector, HyperLogLogCollector collector) Retrieve the current row from dimSelector and add the row values to HyperLogLogCollector.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LongCardinalityAggregatorColumnSelectorStrategy

public LongCardinalityAggregatorColumnSelectorStrategy()

Method Detail

hashRow

public void hashRow(BaseLongColumnValueSelector dimSelector,
                    com.google.common.hash.Hasher hasher)

Description copied from interface: CardinalityAggregatorColumnSelectorStrategy

Retrieve the current row from dimSelector and add the row values to the hasher.

Specified by:

hashRow in interface CardinalityAggregatorColumnSelectorStrategy<BaseLongColumnValueSelector>

Parameters:

dimSelector - Dimension value selector

hasher - Hasher used for cardinality aggregator calculations

hashValues

public void hashValues(BaseLongColumnValueSelector dimSelector,
                       HyperLogLogCollector collector)

Description copied from interface: CardinalityAggregatorColumnSelectorStrategy

Retrieve the current row from dimSelector and add the row values to HyperLogLogCollector.

Specified by:

hashValues in interface CardinalityAggregatorColumnSelectorStrategy<BaseLongColumnValueSelector>

Parameters:

dimSelector - Dimension value selector

collector - HLL collector used for cardinality aggregator calculations